Process of casting iron in permanent molds.



E. A. GUSTER.

PROCESS OF CASTING IRON IN PERMANENT MOLDS.

APPLICATION FILED OCT. 22, 1910.

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1,104,037, Patented July 21,1914.

QR i/h/wooao r 5 wva Wfoz UNITED STATES OFFICE.

EDGAR. A. ousrnn, or PHILADELPHIA, rnivivsyigvnmmassrenon ro- THE- cus'rnn SANDLESS CASTING COMPANY, OF PHII-ADELPHIA, PENNSYLVANIA; m commas;

TION OF DELAWARE.

Specification of Letters Patent.

Patented uly 21, 1914.

Application filed October 22, 1910. Serial No. 588,494.

- To all whom it may concern:

Be it known that I, EDGAR A. CUs'rER, a citizen of the United States, residing at Philadelphia, in the State of Pennsylvania, have invented a certain new and useful Process of Casting Iron in Permanent Molds, of which the following is a specification.

In the casting of iron in permanent metal molds, it has been customary heretofore to fill the mold with molten metal and to control the characteristics of the casting produced by the circumstances of the cooling of the metal to the point of setting.

The primary object of this invention is to provide a process of casting iron in permanent molds, whereby the necessity for controlling the period of setting shall. be avoided.

A further object of the invention is to provide a process whereby a casting of absolutely certain and uniform structure may be obtained.

The further objects of the invention will be more fully stated hereafter in the following description of my improved process, which consists in the new and novel steps and combination of steps hereinafter set forth and claimed.

My improved process consists essentially in causing the molten metal to set as poured and then removing the casting from the mold and permitting same to cool gradually to normal atmospheric temperature.

In practising my invention I may employ foundry iron having the usual constituents. The 'mold is made sufiiciently large so that the heat absorbed thereby will be radiated quickly and prevent the mold from heating at any time to a temperature which will pre vent the metal from setting as poured, as for v example at or above 600 F. The gates are positioned with respect to the section of the Toasting to beproduced, and are so located that the molten metal will be introduced at or near the bottom of the matrix' and will fill the matrix and the gate gradually, so that the metal in both the matrix and the gate will be set progressively at the rate mold before chilling and allowed to coolgradually to atmospheric temperature instead of permitting the casting to be chilled while in the mold.

Reference is now to be had to the accompanying drawings in which- Figure l is a view in side elevation of a mold embodying the present invention, the core and gate being indicated in dotted lines. Fig. 2 is a sectional view taken onthe plane indicated by the line 2-2 of Fig. 1 and lookin the direction of thearrows.

In the accompanying drawings is shown one form of apparatus adapted to carry out my improved process with relation to the casting of a pipe fitting a in which the mold 6 comprises a large mass having a relatively large superficial area compared with the surface of the casting in contact therewith and is made in two or more parts so that it can be opened quickly. The gate a communicates with the full length of the casting and is relatively narrow and is embedded in the mass of the mold so that the metal in the gate will set simultaneously with the casting as the metal is poured.

By means of this process an absolutely homogeneous casting of a uniformly fine texture is obtained. The formation of graphitic carbonis prevented but the formation of annealing carbon is assisted. The complete absence of white crystals, charac-= teristic of chilled iron, makes the product especially desirable for purposes of machining; The metal is susceptible of taking and retaining atemper and will not permanently expand under applications of heat and cold.

I claim-- 1. The process of casting iron in perma- .line of setting to progress in proportion to the rate of pouring by providing a mold of I relatively large mass and superficial area and then removing the casting from the mold prior tochilling.

2. The process of producing a' homogeneous iron casting of,uniformly fine tex-.

ture which consists in causing the metal in the gate and in the matrix to setsimuItaT. neously "andin proportion to the rate of pouring.

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3. The process of casting iron in perma- This specification signed and witnessed nent molds,which consists in filling the mold this 15th day of October, A. D., 1910. gradually from the bottom toward the top,

preventing the temperature of the mold EDGAR GUSTER' from rising above 600 F. and causing the Witnesses: metal to set as poured, and then removing AMBROSE L. OSHEA,

the casting from the mold, N. A. SMITH. 

